Find vc(t) for t ≥ 0 (in v), assuming the switch was open for a long time when closed at t = 0.

assume the capacitor and inductor are initially uncharged.

(1) 3 – 4e–2t + e–8t

(2) 2 – e–2t + 2e–8t

(3) 6 – 6e–4t + 2e–6t

(4) 6 – 6(1+ t)e–8t

(5) 3 + (1+ 4t)e–2t

(6) 3 + [–cos(4t) + 4sin(2t)]e–2t

(7) 3 + [–4cos(4t) + sin(t)]e–t

(8) 3 + [–2cos(4t) + 4sin(2t)]e–4t

(9) none of the above

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.